Papilla

The papilla - The papilla (the blind spot) is the spot there the visual nerve leaves the retina There are no visual cells and you get a point in the visual field there you cannot see anything. Normally you cannot experience this spot exists because the brain will "fill" the missing part, so it feels as continuously.

You can find your own blind spot if you write a small cross on right and a very small dot to the left approximately 10 cm from each other on a white cheet of paper. Then you close your right eye, fixate your eye on the cross and notice the small dot in the outskirts of the visual field. If you increase or decrease the distance between the eye and the paper you will notice in a certain distance the dot will disappear and the paper looks all white. In that case the dot has landed exactly on the blind spot and the brain "fills in" the small part that is missing with that you have around the dot - white paper.